Data Type Object Class for the representation of an Event referent to an action execution
Inheritance: EventDTO
        private void addOrEditButton_Click_1(object sender, EventArgs e)
        {
            try
            {
                EventDTO newEvent = null;
                if (comboBoxEventType.Text == Constants.PROPERTY_CHANGE_EVENT.ToString())
                {
                    newEvent = new PropertyChangeEventDTO
                    {
                        Subject = textBoxSubject.Text,
                        Property = textBoxObject.Text,
                        NewValue = textBoxTarget.Text,
                        Time = ulong.Parse(textBoxTime.Text)
                    };

                }else if (comboBoxEventType.Text == Constants.ACTION_START_EVENT.ToString() || comboBoxEventType.Text == Constants.ACTION_FINISHED_EVENT.ToString())
                {
                    newEvent = new ActionEventDTO()
                    {
                        Subject = textBoxSubject.Text,
                        Action = textBoxObject.Text,
                        Target = textBoxTarget.Text,
                        Time = ulong.Parse(textBoxTime.Text)
                    };
                }

                if (_eventToEdit != null)
                {
                    newEvent.Id = _eventToEdit.Id;
                    _autobiographicalMemoryVm.UpdateEventRecord(newEvent);
                }
                else
                {
                    _autobiographicalMemoryVm.AddEventRecord(newEvent);
                }

                Close();
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message, Resources.ErrorDialogTitle, MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
        }